I'd keep the Sidewinders for now until you get the MF A5.5 CDP.
Although - the CA 650C is a nice player.
I had a 640C v2 connected to my MF A5 Int amp - and it was a very nice combination. I went thru a couple of IC combinations - one of which was AQ Sidewinders and thought it was a good matchup.
My rig has since changed and so have the ICs.
I'm not familiar with the MF CDP or your speakers or what type of sonics you are after, but if you subscribe to the belief that 'everything matters' - you may want to spend some time familiarizing yourself with the A5.5 CDP and the Sidewinders.
I found that ICs can make subtle changes, but it depends on the other components and their characteristics, so a specific cable recommendation may work for me, but not for you.
Ask if your dealer will loan you some ICs to try them out.
Although - the CA 650C is a nice player.
I had a 640C v2 connected to my MF A5 Int amp - and it was a very nice combination. I went thru a couple of IC combinations - one of which was AQ Sidewinders and thought it was a good matchup.
My rig has since changed and so have the ICs.
I'm not familiar with the MF CDP or your speakers or what type of sonics you are after, but if you subscribe to the belief that 'everything matters' - you may want to spend some time familiarizing yourself with the A5.5 CDP and the Sidewinders.
I found that ICs can make subtle changes, but it depends on the other components and their characteristics, so a specific cable recommendation may work for me, but not for you.
Ask if your dealer will loan you some ICs to try them out.